I think its probably died. Having trouble with parameters lately but no cyano or algae blooms apart from hair algae on one snail. Ph is 7.6, kh is 1.1, no3 is 10, no2 is 0.05, nh3/nh4 is zero, salinity was 1.018 before change it is now only 1.020, po4 0.25.
All these were before a water...